ZIP Code 77381 — Spring, TX
77381 is a standard (street delivery) ZIP code serving Spring, Texas, in Montgomery County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 77381 at a glance
| ZIP code | 77381 |
|---|---|
| Primary city | Spring |
| State | Texas (TX) |
| County | Montgomery FIPS 48339 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 36,139 |
| Coordinates | 30.177910, -95.502660 |
How ZIP+4 works in 77381
The four digits after the hyphen encode a delivery segment inside 77381. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 77381 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Other ZIP codes in Spring
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 77381.
| ZIP | City | Distance |
|---|---|---|
| 77382 | Spring, TX | 3 mi |
| 77380 | Spring, TX | 3.5 mi |
| 77384 | Conroe, TX | 3.9 mi |
| 77389 | Spring, TX | 4.3 mi |
| 77385 | Conroe, TX | 4.8 mi |
| 77375 | Tomball, TX | 7.8 mi |
| 77388 | Spring, TX | 8.4 mi |
| 77354 | Magnolia, TX | 9.1 mi |
| 77302 | Conroe, TX | 9.1 mi |
| 77379 | Spring, TX | 9.7 mi |
| 77301 | Conroe, TX | 10 mi |
| 77386 | Spring, TX | 10.2 mi |
Questions about 77381
What is the ZIP+4 code for 77381?
77381 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 77381, you need to look up a specific street address to get them.
What city is 77381?
77381 is assigned to Spring, Texas, in Montgomery County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.